Power adjustment method and power adjustment device

Abstract

A power adjustment method includes a step of calculating an integration error which is an error between a control target value of an integrated amount of grid power transmitted and received between an electric power system and a microgrid and an actual value of the integrated amount of the grid power, a step of generating a first command value for causing a power consuming device to consume power consumption on the basis of a low-frequency component of the integration error, a step of generating a second command value for causing a power storage device to charge and discharge charging/discharging power on the basis of a high-frequency component of the integration error, and a step of outputting the first command value to the power consuming device and outputting the second command value to the power storage device.

The invention claimed is: 
     
       1. A power adjustment method of controlling power consumption of a power consuming device and charging/discharging power of a power storage device included in a microgrid capable of transmitting and receiving electric power to and from an external electric power system, the method comprising:
 a step of calculating an integration error which is an error between a control target value of an integrated amount of grid power transmitted and received between the electric power system and the microgrid and an actual value of the integrated amount of the grid power; 
 a step of generating a first command value for causing the power consuming device to consume the power on the basis of a low-frequency component of the integration error; 
 a step of generating a second command value for causing the power storage device to charge and discharge the charging/discharging power on the basis of a high-frequency component of the integration error; and 
 a step of outputting the first command value to the power consuming device and outputting the second command value to the power storage device. 
 
     
     
       2. The power adjustment method according to  claim 1 , wherein the step of calculating an integration error includes
 a step of calculating an error between a power target value of the grid power and a measured value of the grid power, and 
 a step of calculating the integration error by integrating the error. 
 
     
     
       3. The power adjustment method according to  claim 1 , wherein the step of calculating an integration error includes
 a step of calculating the actual value by integrating a measured value of the grid power, and 
 a step of calculating the integration error by calculating a difference between the control target value and the actual value. 
 
     
     
       4. The power adjustment method according to  claim 1 , wherein the step of generating a second command value includes generating the second command value on the basis of an error between a target value of a remaining amount of the power storage device and the remaining amount, and the high-frequency component. 
     
     
       5. The power adjustment method according to  claim 1 , wherein the control target value increases at a constant rate as time passes in a time interval. 
     
     
       6. The power adjustment method according to  claim 1 , wherein a rate of increase in the control target value changes continuously from a previous time interval. 
     
     
       7. The power adjustment method according to  claim 1 , further comprising a step of, in a case where the first command value is outside a range determined in advance, changing the first command value so as to fall within the range and adding a difference before and after the change to the second command value. 
     
     
       8. The power adjustment method according to  claim 1 , further comprising a step of generating a third command value on the basis of the integration error,
 wherein the step of generating a first command value includes generating the first command value on the basis of a low-frequency component of the third command value, and 
 the step of generating a second command value includes generating the second command value on the basis of a high-frequency component of the third command value. 
 
     
     
       9. A power adjustment device configured to control power consumption of a power consuming device and charging/discharging power of a power storage device included in a microgrid capable of transmitting and receiving electric power to and from an external electric power system, the device comprising at least one processor,
 wherein the at least one processor 
 calculates an integration error which is an error between a control target value of an integrated amount of grid power transmitted and received between the electric power system and the microgrid and an actual value of the integrated amount of the grid power, 
 generates a first command value for causing the power consuming device to consume the power on the basis of a low-frequency component of the integration error, 
 generates a second command value for causing the power storage device to charge and discharge the charging/discharging power on the basis of a high-frequency component of the integration error, and 
 outputs the first command value to the power consuming device and outputting the second command value to the power storage device. 
 
     
     
       10. A power adjustment method of controlling power consumption of a power consuming device and charging/discharging power of a power storage device included in a microgrid capable of transmitting and receiving electric power to and from an external electric power system, the method comprising:
 a step of calculating an error between a control target value of grid power transmitted and received between the electric power system and the microgrid and an actual value of the grid power; 
 a step of generating a first command value for causing the power consuming device to consume the power on the basis of a low-frequency component of the error; 
 a step of generating a second command value for causing the power storage device to charge and discharge the charging/discharging power on the basis of a high-frequency component of the error; and 
 a step of outputting the first command value to the power consuming device and outputting the second command value to the power storage device.